ring binder

美 
英 
  • n.活页簿;活页夹
  • 网络环圈式活页封套;装订机;扣眼活页夹
复数:ring binders  
ring binder
n.
1.
活页簿;活页夹a file for holding papers, in which metal rings go through the edges of the pages, holding them in place

例句

释义:
类别:全部全部,口语口语,书面语书面语,标题标题,技术技术
来源:全部全部,字典字典,网络网络
难度:全部全部,简单简单,中等中等,